core.h 12.9 KB
Newer Older
1
2
3
/*
 * Wireless configuration interface internals.
 *
4
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
5
6
7
8
9
10
 */
#ifndef __NET_WIRELESS_CORE_H
#define __NET_WIRELESS_CORE_H
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/netdevice.h>
11
12
#include <linux/kref.h>
#include <linux/rbtree.h>
13
#include <linux/debugfs.h>
Johannes Berg's avatar
Johannes Berg committed
14
15
#include <linux/rfkill.h>
#include <linux/workqueue.h>
16
17
#include <net/genetlink.h>
#include <net/cfg80211.h>
18
#include "reg.h"
19
20

struct cfg80211_registered_device {
21
	const struct cfg80211_ops *ops;
22
23
24
25
26
27
28
	struct list_head list;
	/* we hold this mutex during any call so that
	 * we cannot do multiple calls at once, and also
	 * to avoid the deregister call to proceed while
	 * any call is in progress */
	struct mutex mtx;

Johannes Berg's avatar
Johannes Berg committed
29
30
31
32
33
	/* rfkill support */
	struct rfkill_ops rfkill_ops;
	struct rfkill *rfkill;
	struct work_struct rfkill_sync;

34
35
36
37
38
39
40
41
42
43
44
45
	/* ISO / IEC 3166 alpha2 for which this device is receiving
	 * country IEs on, this can help disregard country IEs from APs
	 * on the same alpha2 quickly. The alpha2 may differ from
	 * cfg80211_regdomain's alpha2 when an intersection has occurred.
	 * If the AP is reconfigured this can also be used to tell us if
	 * the country on the country IE changed. */
	char country_ie_alpha2[2];

	/* If a Country IE has been received this tells us the environment
	 * which its telling us its in. This defaults to ENVIRON_ANY */
	enum environment_cap env;

46
	/* wiphy index, internal only */
47
	int wiphy_idx;
48
49
50

	/* associate netdev list */
	struct mutex devlist_mtx;
51
	/* protected by devlist_mtx or RCU */
52
	struct list_head netdev_list;
53
	int devlist_generation;
54
55
	int opencount; /* also protected by devlist_mtx */
	wait_queue_head_t dev_wait;
56

57
58
59
60
61
62
	/* BSSes/scanning */
	spinlock_t bss_lock;
	struct list_head bss_list;
	struct rb_root bss_tree;
	u32 bss_generation;
	struct cfg80211_scan_request *scan_req; /* protected by RTNL */
63
	unsigned long suspend_at;
Johannes Berg's avatar
Johannes Berg committed
64
	struct work_struct scan_done_wk;
65

66
67
68
69
#ifdef CONFIG_NL80211_TESTMODE
	struct genl_info *testmode_info;
#endif

70
	struct work_struct conn_work;
Johannes Berg's avatar
Johannes Berg committed
71
	struct work_struct event_work;
72

73
74
75
76
77
78
79
80
81
82
83
84
	/* must be last because of the way we do wiphy_priv(),
	 * and it should at least be aligned to NETDEV_ALIGN */
	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
};

static inline
struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
{
	BUG_ON(!wiphy);
	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
}

85
86
87
88
89
90
91
/* Note 0 is valid, hence phy0 */
static inline
bool wiphy_idx_valid(int wiphy_idx)
{
	return (wiphy_idx >= 0);
}

92
93

extern struct workqueue_struct *cfg80211_wq;
94
extern struct mutex cfg80211_mutex;
95
extern struct list_head cfg80211_rdev_list;
96
extern int cfg80211_rdev_list_generation;
97

98
#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
99

100
101
/*
 * You can use this to mark a wiphy_idx as not having an associated wiphy.
102
 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
103
104
105
 */
#define WIPHY_IDX_STALE -1

106
107
108
109
110
struct cfg80211_internal_bss {
	struct list_head list;
	struct rb_node rbn;
	unsigned long ts;
	struct kref ref;
Johannes Berg's avatar
Johannes Berg committed
111
	atomic_t hold;
112
113
	bool beacon_ies_allocated;
	bool proberesp_ies_allocated;
Kalle Valo's avatar
Kalle Valo committed
114

115
116
117
118
	/* must be last because of priv member */
	struct cfg80211_bss pub;
};

Johannes Berg's avatar
Johannes Berg committed
119
120
121
122
123
static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
{
	return container_of(pub, struct cfg80211_internal_bss, pub);
}

124
125
126
127
128
static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
{
	kref_get(&bss->ref);
}

Johannes Berg's avatar
Johannes Berg committed
129
130
131
132
133
134
135
136
137
138
139
140
static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
{
	atomic_inc(&bss->hold);
}

static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
{
	int r = atomic_dec_return(&bss->hold);
	WARN_ON(r < 0);
}


141
struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
142
143
int get_wiphy_idx(struct wiphy *wiphy);

144
struct cfg80211_registered_device *
145
__cfg80211_rdev_from_info(struct genl_info *info);
146

147
148
149
150
151
152
/*
 * This function returns a pointer to the driver
 * that the genl_info item that is passed refers to.
 * If successful, it returns non-NULL and also locks
 * the driver's mutex!
 *
153
 * This means that you need to call cfg80211_unlock_rdev()
154
 * before being allowed to acquire &cfg80211_mutex!
155
156
157
 *
 * This is necessary because we need to lock the global
 * mutex to get an item off the list safely, and then
158
 * we lock the rdev mutex so it doesn't go away under us.
159
 *
160
 * We don't want to keep cfg80211_mutex locked
161
162
163
164
165
166
167
168
169
 * for all the time in order to allow requests on
 * other interfaces to go through at the same time.
 *
 * The result of this can be a PTR_ERR and hence must
 * be checked with IS_ERR() for errors.
 */
extern struct cfg80211_registered_device *
cfg80211_get_dev_from_info(struct genl_info *info);

170
/* requires cfg80211_rdev_mutex to be held! */
171
172
struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

173
174
/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
extern struct cfg80211_registered_device *
175
176
177
178
cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
			  struct net *net);
179

180
static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
Johannes Berg's avatar
Johannes Berg committed
181
{
182
	mutex_lock(&rdev->mtx);
Johannes Berg's avatar
Johannes Berg committed
183
184
}

185
static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
186
{
187
188
	BUG_ON(IS_ERR(rdev) || !rdev);
	mutex_unlock(&rdev->mtx);
189
}
190

Johannes Berg's avatar
Johannes Berg committed
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
static inline void wdev_lock(struct wireless_dev *wdev)
	__acquires(wdev)
{
	mutex_lock(&wdev->mtx);
	__acquire(wdev->mtx);
}

static inline void wdev_unlock(struct wireless_dev *wdev)
	__releases(wdev)
{
	__release(wdev->mtx);
	mutex_unlock(&wdev->mtx);
}

#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));

enum cfg80211_event_type {
	EVENT_CONNECT_RESULT,
	EVENT_ROAMED,
	EVENT_DISCONNECTED,
	EVENT_IBSS_JOINED,
};

struct cfg80211_event {
	struct list_head list;
	enum cfg80211_event_type type;

	union {
		struct {
			u8 bssid[ETH_ALEN];
			const u8 *req_ie;
			const u8 *resp_ie;
			size_t req_ie_len;
			size_t resp_ie_len;
			u16 status;
		} cr;
		struct {
			u8 bssid[ETH_ALEN];
			const u8 *req_ie;
			const u8 *resp_ie;
			size_t req_ie_len;
			size_t resp_ie_len;
		} rm;
		struct {
			const u8 *ie;
			size_t ie_len;
			u16 reason;
		} dc;
		struct {
			u8 bssid[ETH_ALEN];
		} ij;
	};
};

Johannes Berg's avatar
Johannes Berg committed
246
247
248
249
250
251
struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
};

Johannes Berg's avatar
Johannes Berg committed
252

253
/* free object */
254
extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
255

256
extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
257
258
			       char *newname);

259
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
260
261
void wiphy_update_regulatory(struct wiphy *wiphy,
			     enum nl80211_reg_initiator setby);
262

263
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
264
265
void cfg80211_bss_age(struct cfg80211_registered_device *dev,
                      unsigned long age_secs);
266

Johannes Berg's avatar
Johannes Berg committed
267
/* IBSS */
Johannes Berg's avatar
Johannes Berg committed
268
269
int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
270
271
			 struct cfg80211_ibss_params *params,
			 struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
272
273
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
274
275
		       struct cfg80211_ibss_params *params,
		       struct cfg80211_cached_keys *connkeys);
276
void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
277
278
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
279
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
280
			struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
281
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
Johannes Berg's avatar
Johannes Berg committed
282
283
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
			    struct wireless_dev *wdev);
Johannes Berg's avatar
Johannes Berg committed
284

Johannes Berg's avatar
Johannes Berg committed
285
/* MLME */
Johannes Berg's avatar
Johannes Berg committed
286
287
288
289
290
291
int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
			 struct ieee80211_channel *chan,
			 enum nl80211_auth_type auth_type,
			 const u8 *bssid,
			 const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
292
			 const u8 *ie, int ie_len,
293
294
			 const u8 *key, int key_len, int key_idx,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
295
296
297
298
int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
		       struct net_device *dev, struct ieee80211_channel *chan,
		       enum nl80211_auth_type auth_type, const u8 *bssid,
		       const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
299
		       const u8 *ie, int ie_len,
300
301
		       const u8 *key, int key_len, int key_idx,
		       bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
302
303
304
305
306
307
308
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			  struct net_device *dev,
			  struct ieee80211_channel *chan,
			  const u8 *bssid, const u8 *prev_bssid,
			  const u8 *ssid, int ssid_len,
			  const u8 *ie, int ie_len, bool use_mfp,
			  struct cfg80211_crypto_settings *crypt);
Johannes Berg's avatar
Johannes Berg committed
309
310
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			struct net_device *dev, struct ieee80211_channel *chan,
311
312
			const u8 *bssid, const u8 *prev_bssid,
			const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
313
314
			const u8 *ie, int ie_len, bool use_mfp,
			struct cfg80211_crypto_settings *crypt);
Johannes Berg's avatar
Johannes Berg committed
315
316
int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
317
318
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
319
320
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev, const u8 *bssid,
321
322
			 const u8 *ie, int ie_len, u16 reason,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
323
324
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
325
326
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
327
328
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
Johannes Berg's avatar
Johannes Berg committed
329
330
331
void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
			       const u8 *req_ie, size_t req_ie_len,
			       const u8 *resp_ie, size_t resp_ie_len,
332
333
			       u16 status, bool wextev,
			       struct cfg80211_bss *bss);
334
335
336
337
338
339
340
341
342
int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
				  const u8 *match_data, int match_len);
void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid);
void cfg80211_mlme_purge_actions(struct wireless_dev *wdev);
int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
			 struct ieee80211_channel *chan,
			 enum nl80211_channel_type channel_type,
			 const u8 *buf, size_t len, u64 *cookie);
Johannes Berg's avatar
Johannes Berg committed
343

344
/* SME */
Johannes Berg's avatar
Johannes Berg committed
345
346
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
347
		       struct cfg80211_connect_params *connect,
348
349
		       struct cfg80211_cached_keys *connkeys,
		       const u8 *prev_bssid);
350
351
int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
352
353
		     struct cfg80211_connect_params *connect,
		     struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
354
355
356
int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, u16 reason,
			  bool wextev);
357
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
358
359
			struct net_device *dev, u16 reason,
			bool wextev);
Johannes Berg's avatar
Johannes Berg committed
360
361
362
void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
		       const u8 *req_ie, size_t req_ie_len,
		       const u8 *resp_ie, size_t resp_ie_len);
Johannes Berg's avatar
Johannes Berg committed
363
364
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);
365

366
void cfg80211_conn_work(struct work_struct *work);
367
void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
368
bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
369

370
/* internal helpers */
Johannes Berg's avatar
Johannes Berg committed
371
372
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
				   struct key_params *params, int key_idx,
373
				   const u8 *mac_addr);
Johannes Berg's avatar
Johannes Berg committed
374
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
375
376
377
			     size_t ie_len, u16 reason, bool from_ap);
void cfg80211_sme_scan_done(struct net_device *dev);
void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
Johannes Berg's avatar
Johannes Berg committed
378
void cfg80211_sme_disassoc(struct net_device *dev, int idx);
Johannes Berg's avatar
Johannes Berg committed
379
void __cfg80211_scan_done(struct work_struct *wk);
380
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
Johannes Berg's avatar
Johannes Berg committed
381
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
382
383
384
385
int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, enum nl80211_iftype ntype,
			  u32 *flags, struct vif_params *params);
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
386

387
388
389
struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
		  int freq, enum nl80211_channel_type channel_type);
390
391
392
int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
		      struct wireless_dev *wdev, int freq,
		      enum nl80211_channel_type channel_type);
393

394
395
u16 cfg80211_calculate_bitrate(struct rate_info *rate);

396
397
398
399
400
401
402
403
404
405
406
#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
#define CFG80211_DEV_WARN_ON(cond)	WARN_ON(cond)
#else
/*
 * Trick to enable using it as a condition,
 * and also not give a warning when it's
 * not used that way.
 */
#define CFG80211_DEV_WARN_ON(cond)	({bool __r = (cond); __r; })
#endif

407
#endif /* __NET_WIRELESS_CORE_H */